Unleashed Ser.: LINQ Unleashed : For C# by Paul Kimmel (2009, Trade Paperback)

Pro LINQ Language Integrated Query in C# 2008 Joseph Rattz Jr Apress .NET Book

Pro LINQ: Language Integrated Query in C# 2008 (Experts Voice in NET)

Murach's ADO.NET 3.5, LINQ, and the Entity Framework with C# 2008

LINQ to Objects Using C# 4.0 : Using and Extending LINQ to Object

Pro LINQ: Language Integrated Query in C 2008 (Experts Voice in NET) - GOOD

LINQ to Objects Using C# 4.0: Using and Extending LINQ to Objects and Par - GOOD

PROFESSIONAL LINQ, by Scott Klein (LINQ database queries in C# and VB)